1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9458f8ec941f8b0ed46ae6468dd80188f33645677304b085e0de836ea01bae3e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/faa7c5f0-2494-48eb-9b0b-f06a6a7520b4.json and https://artists.proofprofile.net/proofs/artist/faa7c5f0-2494-48eb-9b0b-f06a6a7520b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6324a4b69ca5316cc57b64c1c7ad777ad1d5332ec61f7471cc8c456ca97abc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF152401038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477f3c190e29edb547dfde2f0ef75013930318033b9e3039f13735df0867f34e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2449251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6682dcd8715fafd5c9c8e552138df3b133417eb298142d8e883c30caeaec125a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2449250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f162633836fbd1217790460621b9fcb7d2fd106f82cbc67444f2cd7a9ff7f5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZYFZ2349027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dc55fbad3945ffa48149dd06d779f5f473e51fb19061b9fb5cd182cdc21752. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2312068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad498663788b4856608c6b21c94db2a0a0984d7f73c6a584bc646c59bc9304f3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEP2280924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6130246582b5127cf35f992b63a79ec89a5f2b3891e0c7c01ed997074af93051. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2281914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5792625c04ad12384064da394536cffb2651f8051ae0fc6452a1e22db8bc5f02. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2148052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84a2af4af6e92d4649a6d3571f89a6593f00f0bc95a49e2856a001cf4d3f292. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2148053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9a156be5f34921d83650a66ad2bd62873a0fa6522f37e696d60861b24fe314. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9L2242933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701d5e0c2926c0a8f84e971b66506d6d36cd501871b021e8c11ad68e845355fc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJV2326527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5d4c3e8e2fc4624a5038182d70f6f7f700de524a72df9329b400caefe1151a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKXN22334303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635e6b47636d1ed67ce645452c32555caf814232a095876ea23cfb29be8abb60. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ8A2395313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4e0848ec6b315ad66b09ef907762dbd235cefa8eeb06e8761ef1a89a4efe8e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNW72410904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8612a676e985a37e993717be36868873b23e185dd28da104387edeab9b6d1d4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLFP2521235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe126e035c0698ad71748a26d86955e8d37a1946912e40f68ff08c53a9ed5d4d0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2463680.